:root {
  color-scheme: dark;
  --bg: #0a0f1f;
  --bg-soft: #111937;
  --text: #f5f7ff;
  --muted: #9fb0d6;
  --brand: #ffcc00;
  --brand-2: #7a67ff;
  --border: #27335f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 10% 0%, #172759 0%, var(--bg) 45%);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(10, 15, 31, 0.85);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  font-size: 1.25rem;
  font-weight: 800;
}

.brand-with-icon {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 18px;
}

.nav-links a {
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  padding: 64px 0 28px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
}

.hero p {
  margin: 0;
  max-width: 760px;
}

.eyebrow {
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 12px;
}

.actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  border-radius: 999px;
  padding: 11px 18px;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--brand);
  color: #171717;
}

.btn-secondary {
  border-color: var(--border);
  background: var(--bg-soft);
}

section {
  padding: 24px 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.45rem;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.card {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  border-radius: 16px;
  padding: 16px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.kpi-card {
  text-align: center;
}

.kpi-mini {
  text-align: center;
  padding: 14px 12px;
}

.kpi-value {
  margin: 0 0 6px;
  color: var(--brand);
  font-size: 1.85rem;
  font-weight: 800;
}

.kpi-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.mode-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mode-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  flex-shrink: 0;
}

.mode-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
}

.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.tags span {
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: rgba(122, 103, 255, 0.16);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

th,
td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

.difficulty-level {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.difficulty-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.difficulty-dot.easy {
  background: #22c55e;
}

.difficulty-dot.medium {
  background: #eab308;
}

.difficulty-dot.hard {
  background: #ef4444;
}

.page-content {
  padding: 56px 0;
}

.page-content h1 {
  margin-top: 0;
}

.page-content ul {
  margin: 0;
}

.screenshot-placeholder {
  min-height: 150px;
}

.muted {
  color: var(--muted);
  margin-top: 12px;
}

.quote {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.site-footer {
  margin-top: 30px;
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

@media (max-width: 700px) {
  .nav-wrap,
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}